Update app.py

app.py

@@ -151,9 +151,9 @@ def invoke(openai_api_key, rag_option, prompt):
         raise gr.Error("Retrieval Augmented Generation is required.")
     if (prompt == ""):
         raise gr.Error("Prompt is required.")
+    chain = None
     completion = ""
     result = ""
-    chain = None
     err_msg = ""
     try:
         start_time_ms = round(time.time() * 1000)
@@ -175,7 +175,7 @@ def invoke(openai_api_key, rag_option, prompt):
             print("###")
             print(completion)
             print("###")
-            print(chain.llm_chain)
+            print(type(chain.llm_chain))
             print("###")
         else:
             completion, chain = llm_chain(llm, prompt)
@@ -184,7 +184,7 @@ def invoke(openai_api_key, rag_option, prompt):
             print("###")
             print(completion)
             print("###")
-            print(chain.llm.client)
+            print(chain["llm.client"])
             print("###")
 
     except Exception as e: